1. Engineer, Trussell Technologies, Inc., 232 N. Lake Ave., Suite 300, Pasadena, CA 91101.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of South Florida, 4202 E. Fowler Avenue, ENB 118, Tampa, FL, 33620.
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of South Florida, 4202 E. Fowler Avenue, ENB 118, Tampa, FL, 33620 (corresponding author).